<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 警告区域 -->
      <el-alert
        show-icon
        title="警告:只允许为第三级分类设置相关参数"
        type="warning"
        :closable="false"
      ></el-alert>
      <!-- 选择商品区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类:</span>
          <!-- 选择商品列表的级联选择框 -->
          <el-cascader
            v-model="selectcatelistkeys"
            expand-trigger="hover"
            :options="catelist"
            :props="cateprops"
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>
      <!-- tab页签区域 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <!-- 添加动态参数 -->
        <el-tab-pane label="动态参数" name="many">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisable"
            @click="adddialogVisible = true"
            >添加参数</el-button
          >
          <!-- 动态参数表格 -->
          <el-table :data="manyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <!-- 循环遍历渲染attr_vals -->
              <template slot-scope="scope">
                <el-tag
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handclose(i,scope.row)"
                >
                  {{ item }}
                </el-tag>
                <!-- 实现添加tag标签 -->
                <!-- 输入文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加 -->
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column
              label="参数名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showedit(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="deleteedit(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <!-- 添加静态属性 -->
        <el-tab-pane label="静态属性" name="only">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisable"
            @click="adddialogVisible = true"
            >添加属性</el-button
          >
          <!-- 静态参数表格 -->
          <el-table :data="OnlyTableData" border stripe>
            <!-- 展开行 -->
            <!-- 展开行 -->
            <el-table-column type="expand">
              <!-- 循环遍历渲染attr_vals -->
              <template slot-scope="scope">
                <el-tag
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handclose(i,scope.row)"
                >
                  {{ item }}
                </el-tag>
                <!-- 实现添加tag标签 -->
                <!-- 输入文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加 -->
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column
              label="属性名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showedit(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="deleteedit(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加参数对话框 -->
    <el-dialog
      :title="'添加' + titletext"
      :visible.sync="adddialogVisible"
      width="50%"
      @close="adddialogVisibleClose"
    >
      <!-- 行内容 -->
      <el-form
        :model="addForm"
        :rules="addFormrules"
        ref="addFormrulesRef"
        label-width="100px"
      >
        <el-form-item :label="titletext" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="adddialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addparams">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改参数对话框 -->
    <el-dialog
      :title="'修改' + titletext"
      :visible.sync="editdialogVisible"
      width="50%"
      @close="editdialogVisibleClose"
    >
      <!-- 行内容 -->
      <el-form
        :model="editForm"
        :rules="editFormrules"
        ref="editFormrulesRef"
        label-width="100px"
      >
        <el-form-item :label="titletext" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editdialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editparams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      //商品列表数据保存
      catelist: [],
      //级联选择框的配置对象
      cateprops: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
      },
      //级联选择框双向绑定数据
      selectcatelistkeys: [],
      activeName: 'many',
      //动态与静态数据保存
      manyTableData: [],
      OnlyTableData: [],
      //控制添加对话框显示
      adddialogVisible: false,
      //添加表单数据对象
      addForm: {
        attr_name: '',
      },
      //验证规则
      addFormrules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' },
        ],
      },

      //控制添加对话框显示
      editdialogVisible: false,
      //添加表单数据对象
      editForm: {},
      //验证规则
      editFormrules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' },
        ],
      },

    }
  },
  created() {
    this.gateCateList()
  },
  methods: {
    //获取所有的商品分类参数
    async gateCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表数据失败')
      }
      this.catelist = res.data
      this.$message.success('获取分类参数列表成功')
    },
    //级联选择框变化
    handleChange() {
      this.getParamsData()
    },
    handleTabClick() {
      console.log(this.activeName)
      this.getParamsData()
    },
    //获取参数列表数据
    async getParamsData() {
      if (this.selectcatelistkeys.length !== 3) {
        this.selectcatelistkeys = []
        this.manyTableData = []
        this.OnlyTableData = []
        return
      }
      //选中的是三级
      console.log(this.selectcatelistkeys)
      //根据所选分类的id和所处表模板获取对应参数
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        { params: { sel: this.activeName } }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数失败')
      }
      res.data.forEach((item) => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        //控制文本框的显示与隐藏
        item.inputVisible = false
        //文本框输入的值
        item.inputValue = ''
      })
      console.log(res.data)
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.OnlyTableData = res.data
      }
    },
    //监听添加对话框的关闭事件
    adddialogVisibleClose() {
      this.$refs.addFormrulesRef.resetFields()
    },
    //点击确定添加
    addparams() {
      this.$refs.addFormrulesRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.post(
          `categories/${this.cateId}/attributes`,
          { attr_name: this.addForm.attr_name, attr_sel: this.activeName }
        )

        if (res.meta.status !== 201) {
          return this.$message.error('添加' + this.titletext + '失败')
        }
        this.$message.success('添加' + this.titletext + '成功')
        this.adddialogVisible = false
        this.getParamsData()
      })
    },
    //监听编辑对话框
    async showedit(attr_id) {
      //查询当前参数信息
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes/${attr_id}`,
        { params: { attr_sel: this.activeName } }
      )
      if (res.meta.status !== 200) {
        return this.$$message.error('获取数据失败')
      }
      this.editForm = res.data
      this.editdialogVisible = true
    },
    editdialogVisibleClose() {
      this.$refs.editFormrulesRef.resetFields()
    },
    editparams() {
      this.$refs.editFormrulesRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.put(
          `categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          { attr_name: this.editForm.attr_name, attr_sel: this.activeName }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('修改信息失败')
        }
        this.$message.success('修改信息成功')
        this.getParamsData()
        this.editdialogVisible = false
      })
    },
    //删除对应参数数据
    async deleteedit(attr_id) {
      const comfirmResult = await this.$confirm(
        '此操作将永久删除该参数, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)
      if (comfirmResult !== 'confirm') {
        return this.$message.info('用户取消了删除操作')
      }
      //删除
      const { data: res } = await this.$http.delete(
        `categories/${this.cateId}/attributes/${attr_id}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除参数失败')
      }
      this.$message.success('已经成功删除信息')
      this.getParamsData()
    },
    //tag文本框失去焦点或者按下enter键
   async handleInputConfirm(row){
        if(row.inputValue.trim().length === 0){
            row.inputValue = ''
            row.inputVisible = false
            return
        }
        //证明输入了真实的内容
        row.attr_vals.push(row.inputValue.trim())
        row.inputValue = ''
        row.inputVisible = false
        //保存到数据库
       this.saveAttrVals(row)
    },
   async saveAttrVals(row){
       const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/
        ${row.attr_id}`,{
            attr_name: row.attr_name,
            attr_sel: row.attr_sel,
            attr_vals: row.attr_vals.join(' ')
        })
        if(res.meta.status !==200){
            return this.$message.error('更新数据失败')
        }
        this.$message.success('更新数据成功')
    },
    //点击按钮展示文本框
    showInput(row){
        row.inputVisible = true
        //$nextTick的方法和作用就是当页面被重新渲染后，才会调用指定代码
        this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
    },
    handclose(i,row){
        row.attr_vals.splice(i,1)
        this.saveAttrVals(row)
    }
  },
  computed: {
    //如果按钮需要被禁用，返回ture
    isBtnDisable() {
      if (this.selectcatelistkeys.length !== 3) {
        return true
      }
      return false
    },
    //当前选中的分类id
    cateId() {
      if (this.selectcatelistkeys.length === 3) {
        return this.selectcatelistkeys[2]
      }
      return null
    },
    //计算标题属性
    titletext() {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    },
  },
}
</script>
<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}
.el-tag {
  margin: 10px;
}
.input-new-tag{
    width: 120px;
}
</style>